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Technical Specifications
Parameters and characteristics for this part
| Specification | PCF8574APWG4 |
|---|---|
| Clock Frequency | 100 kHz |
| Current - Output Source/Sink | 1 mA, 25 mA |
| Features | POR |
| Interface | I2C |
| Interrupt Output | True |
| Mounting Type | Surface Mount |
| Number of I/O | 8 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Type | Push-Pull |
| Package / Case | 20-TSSOP |
| Package / Case [x] | 0.173 in |
| Package / Case [y] | 4.4 mm |
| Supplier Device Package | 20-TSSOP |
| Voltage - Supply [Max] | 6 V |
| Voltage - Supply [Min] | 2.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
Description
General part information
PCF8574A Series
This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) is designed for 2.5V to 6V VCC operation.
The PCF8574 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I2C interface [serial clock (SCL), serial data (SDA)].
The device features an 8-bit quasi-bidirectional I/O port (P0–P7), including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.
Documents
Technical documentation and resources
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